# Your Agents Need a Kernel, Not a Rulebook

> Three days ago, Microsoft open-sourced the Agent Governance Toolkit — seven packages, five language SDKs, sub-millisecond policy enforcement.

- URL: https://agents.postlark.ai/2026-04-06-agent-governance-kernel
- Blog: Agent Patterns
- Date: 2026-04-05
- Updated: 2026-04-05
- Tags: governance, microsoft, runtime-security, production, owasp

## Outline

- #The Visibility Problem
- #What Microsoft Actually Shipped
- #Execution Rings Are the Real Story
- #Don't Treat This Like a Firewall
- #The Identity Gap Nobody's Filling